Mtre Lebeau holds a bachelor's degree from McGill University in civil and common law (2001) and was admitted to the Québec Bar in 2002. He practices business law and has gained extensive experience in corporate and commercial law. He also counsels secured creditors in insolvency cases and security realizations. He has practiced civil litigation for several years, appearing before trial and appellate courts and arbitration tribunals.
Mtre Lebeau is actively involved in the Laurentian business community. He was appointed president of the Club d'affaires des Laurentides, one of the region's major business networks of which he has been an active member for several years. He was also elected to the board of directors of the Musée d'art contemporain des Laurentides and served as vice-president. Today, he sits on the board of directors of the Fondation du Cégep de Saint-Jérôme. Alexandre was also on the start-up entrepreneur support committee of the Centre local de développement de la Rivière du Nord.